Stem winding watch



' (NQModeLj. v l Y I BACHNER.

- STEM WINDING WATGH. No. 358,424. Patented Malz-1, 1887.

UNITED STATES PATENT Fries.

'JOSEPH BACHNER, OF CHICAGO, ILLINOIS, ASVSIGNOR TO HIllISEIiF AND GEORGE A. IIARMOUNT, OF SAME PLACE.

STEM-WHNDING WATCH.

SPECIFICATION forming part of Letters Patent No. 358,424, dated M'areii l, 1887.

Application filed December 2, 1885. Renewed November 5, 1886. Serial No. 218,073. (No model.)

To all whom, it 11mg/ concern.-

Beit known that l, JosEPl-i Baci-Irvine, a cilizen of the Republic of France, (who has declared his intention of becoming a citizen of the United States) residing in Chicago, in the county of Cook and State of Illinois, have iuvented a new and useful Improvement in Watches and Clocks, of which the following is a specification.

This invention relates to stem winding watches and clocks, and is designed to simplify the mechanism whereby motion is communicated from the stem to the niainspring-shaft and to the hands. I accomplish this object by making the winding-stein capable ol" a slight longitudinal adjustment, so that it may be rotated in either of two positions at will-one position being the winding and the other the setting position. In the former of these the gear carried by the stem meshes with the ini.- tial one of a train of gears carrying motion to the mainspring-shaft, and in the latter position it meshes with a pinion connected with the hands. To free the stemgear from engagement with the winding mechanism when the Watch is to be set, I move the stem to the setting position, and in so doing I displace the initial pinion ofthe winding mechanism ternporarily by acam or equivalent device, which will operate to throw said pinion out of line with the stem-pinion and allow the latter to move into engagement with the setting mechanism.

The invention may be said, therefore, to consist in a winding-stein longitudinally adjustable to and rotatable in either of two positions-viz., a winding or normal position and a setting position-combined with a movable gear forconveying motion to the hands, and devices for moving said gear into mesh with the stem when the latter is adjusted to the setting position.

The invention further consists in the longitudinally-adjustable stem iu combination with gearing connected to the mainspring and hands and meshing with the stem in its different positions, a portion of said gearing being also movable to and from the stem, and devices for so moving the same.

It also consists in the novel construction and combinations ofparts hereinafter specified and claimed.

My invention is fully illustrated in the accompanying drawings, wherein- Figures l and 2 represent opposite sides or' 55 a watch-movement to which my invention has been applied. Figs. `3 and 4 are sections upon the line x a: ol' Fig. l, the iirst of these sections showing the parts in position `to wind and the second in position to set. Fig. 5 is a perspec- 6c tive of the cam for throwing the gear out of mesh.

In said drawings, A represents the case of a watch, A A the side plates ofthe movement, and B the stem-Winderthereof. The latter carries the usual spur-gear, b, and is permitted a slight longitudinal adjustment in its bearing. A spring, b', eucircles the stem within its bearing and presses against the gear b and tends to keep the stem in its innermost posi- 7o tion. This innermost position I prefer to make the normal or winding position, though the outer one can be so used, if preferred, with slight changes in the mechanisms. In this inner position the gear I) meshes with the spurgear C, by which motion is carried to the mainspring-shaft.

Vhen itis desired to set the watch, the stem is pulled out against the pressure of the spring b and held there while the settingis being done. 8o In this outer position the gear b meshes with a gear, D, which is the initial one ot' a train of gears connecting with the hands. rIhe outer movement of the stem secures this enga-gement with pinion b in manner following: The journal d of gear D is elongated and is free to move longitudinally in its bearing, and when the stem is withdrawn the cam E, part of which lies between said gear and the plate A', in obedience to the pressure of the spring E', 9o moves from the position shown in Fig. 3 to that shown in Fig. 4, thereby allowing said gear D to move laterally into line with the gear b, engagement between them being the result. The watch may now be set, and when done the stem is released and returns under force of spring b to the position shown in Fig. 3. In this movement the gear b presses upon the cam E and thereby forces gear D out of mesh, so that it forms no obstacle to the inward rco The stein is now again illustrated, with an inclined surface, e, and a slot, e', for the passage of the arbor d; and to properly conne the cam I employ a secondary spring, e2, Of course the side plate of the movement should be provided With an inclined surface, e, upon which the incline e of the cam may ride.

rIhe spring encircling the Winding stem should be of such strength that it Will not be overcome by the spring E', but, on the contrary, it should control the latter to prevent accidental change from the normal position by the stem.

The invention is equally applicable to stem- Winding clocks without change.

I claim- 1. In a stem-winding Watch or clock, a longitudinally adjustable stern, in combination with gears connected to the mainspring and hands and meshing with the stein in its different positions, one of said gears being also movable to and from the stem, and mechanism for so moving said gearing, substantially as specified.

2. In a stem-Winding Watch or clock, a stem longitudinally adjustable, as set forth, in combination with a movable gear for conveying motion to the hands, and devices for moving said gear into and out of mesh with the stem when thelatter is adj usted tothe setting position, substantially as speeilied.

3. A stem longitudinally adjustable, as Set forth, and gears for conveying motion to the mainspring and hands, in combination with aoam or equivalent device operated by the longitudinal movement of the stem for throwing the movable gear out of mesh, substantially as specified.

4. A stem longitudinally adjustable, as set forth, and gears for conveying motion therefrom to both the mainspring-shaft and the hands, in combination with a cam or equiva- 

